/// <summary>
/// An enumeration of paragraphs of the portable document.
/// </summary>
/// <param name="file">The portable document file stream.</param>
/// <returns>A <see cref="IEnumerable{T}"/> of paragraphs.</returns>
public static IEnumerable <string> Paragraphs(Stream file)
{
using (iText7.PdfReader reader = new iText7.PdfReader(file))
{
using (iText7.PdfDocument doc = new iText7.PdfDocument(reader))
{
int numberOfPages = doc.GetNumberOfPages();
for (int i = 1; i <= numberOfPages; i++)
{
iText7.PdfPage page = doc.GetPage(i);
string pagetext = iText7.Canvas.Parser.PdfTextExtractor.GetTextFromPage(page);
pagetext = Common.CleanPdfText(pagetext);
// Parse paragraphs.
IEnumerable <string> paragraphs = pagetext.Split(new[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries);
foreach (string item in paragraphs)
{
yield return(item);
}
}
}
}
}
public virtual void StructElemTest03()
{
FileStream fos = new FileStream(destinationFolder + "structElemTest03.pdf", FileMode.Create);
PdfWriter writer = new PdfWriter(fos);
writer.SetCompressionLevel(CompressionConstants.NO_COMPRESSION);
PdfDocument document = new PdfDocument(writer);
document.SetTagged();
document.GetStructTreeRoot().GetRoleMap().Put(new PdfName("Chunk"), PdfName.Span);
PdfStructElem doc = document.GetStructTreeRoot().AddKid(new PdfStructElem(document, PdfName.Document));
PdfPage page1 = document.AddNewPage();
PdfCanvas canvas = new PdfCanvas(page1);
canvas.BeginText();
canvas.SetFontAndSize(PdfFontFactory.CreateFont(FontConstants.COURIER), 24);
canvas.SetTextMatrix(1, 0, 0, 1, 32, 512);
PdfStructElem paragraph = doc.AddKid(new PdfStructElem(document, PdfName.P));
PdfStructElem span1 = paragraph.AddKid(new PdfStructElem(document, PdfName.Span, page1));
canvas.OpenTag(new CanvasTag(span1.AddKid(new PdfMcrNumber(page1, span1))));
canvas.ShowText("Hello ");
canvas.CloseTag();
PdfStructElem span2 = paragraph.AddKid(new PdfStructElem(document, new PdfName("Chunk"), page1));
canvas.OpenTag(new CanvasTag(span2.AddKid(new PdfMcrNumber(page1, span2))));
canvas.ShowText("World");
canvas.CloseTag();
canvas.EndText();
canvas.Release();
PdfPage page2 = document.AddNewPage();
canvas = new PdfCanvas(page2);
canvas.BeginText();
canvas.SetFontAndSize(PdfFontFactory.CreateFont(FontConstants.HELVETICA), 24);
canvas.SetTextMatrix(1, 0, 0, 1, 32, 512);
paragraph = doc.AddKid(new PdfStructElem(document, PdfName.P));
span1 = paragraph.AddKid(new PdfStructElem(document, PdfName.Span, page2));
canvas.OpenTag(new CanvasTag(span1.AddKid(new PdfMcrNumber(page2, span1))));
canvas.ShowText("Hello ");
canvas.CloseTag();
span2 = paragraph.AddKid(new PdfStructElem(document, new PdfName("Chunk"), page2));
canvas.OpenTag(new CanvasTag(span2.AddKid(new PdfMcrNumber(page2, span2))));
canvas.ShowText("World");
canvas.CloseTag();
canvas.EndText();
canvas.Release();
page1.Flush();
page2.Flush();
document.Close();
PdfReader reader = new PdfReader(new FileStream(destinationFolder + "structElemTest03.pdf", FileMode.Open,
FileAccess.Read));
document = new PdfDocument(reader);
NUnit.Framework.Assert.AreEqual(2, (int)document.GetNextStructParentIndex());
PdfPage page = document.GetPage(1);
NUnit.Framework.Assert.AreEqual(0, page.GetStructParentIndex());
NUnit.Framework.Assert.AreEqual(2, page.GetNextMcid());
document.Close();
}
public virtual void StructElemTest04()
{
MemoryStream baos = new MemoryStream();
PdfWriter writer = new PdfWriter(baos);
writer.SetCompressionLevel(CompressionConstants.NO_COMPRESSION);
PdfDocument document = new PdfDocument(writer);
document.SetTagged();
document.GetStructTreeRoot().GetRoleMap().Put(new PdfName("Chunk"), PdfName.Span);
PdfStructElem doc = document.GetStructTreeRoot().AddKid(new PdfStructElem(document, PdfName.Document));
PdfPage page = document.AddNewPage();
PdfCanvas canvas = new PdfCanvas(page);
canvas.BeginText();
canvas.SetFontAndSize(PdfFontFactory.CreateFont(StandardFonts.COURIER), 24);
canvas.SetTextMatrix(1, 0, 0, 1, 32, 512);
PdfStructElem paragraph = doc.AddKid(new PdfStructElem(document, PdfName.P));
PdfStructElem span1 = paragraph.AddKid(new PdfStructElem(document, PdfName.Span, page));
canvas.OpenTag(new CanvasTag(span1.AddKid(new PdfMcrNumber(page, span1))));
canvas.ShowText("Hello ");
canvas.CloseTag();
PdfStructElem span2 = paragraph.AddKid(new PdfStructElem(document, new PdfName("Chunk"), page));
canvas.OpenTag(new CanvasTag(span2.AddKid(new PdfMcrNumber(page, span2))));
canvas.ShowText("World");
canvas.CloseTag();
canvas.EndText();
canvas.Release();
page.Flush();
document.Close();
byte[] bytes = baos.ToArray();
PdfReader reader = new PdfReader(new MemoryStream(bytes));
writer = new PdfWriter(destinationFolder + "structElemTest04.pdf");
writer.SetCompressionLevel(CompressionConstants.NO_COMPRESSION);
document = new PdfDocument(reader, writer);
page = document.GetPage(1);
canvas = new PdfCanvas(page);
PdfStructElem p = (PdfStructElem)document.GetStructTreeRoot().GetKids()[0].GetKids()[0];
canvas.BeginText();
canvas.SetFontAndSize(PdfFontFactory.CreateFont(StandardFonts.COURIER), 24);
canvas.SetTextMatrix(1, 0, 0, 1, 32, 490);
//Inserting span between of 2 existing ones.
span1 = p.AddKid(1, new PdfStructElem(document, PdfName.Span, page));
canvas.OpenTag(new CanvasTag(span1.AddKid(new PdfMcrNumber(page, span1))));
canvas.ShowText("text1");
canvas.CloseTag();
//Inserting span at the end.
span1 = p.AddKid(new PdfStructElem(document, PdfName.Span, page));
canvas.OpenTag(new CanvasTag(span1.AddKid(new PdfMcrNumber(page, span1))));
canvas.ShowText("text2");
canvas.CloseTag();
canvas.EndText();
canvas.Release();
page.Flush();
document.Close();
CompareResult("structElemTest04.pdf", "cmp_structElemTest04.pdf", "diff_structElem_04_");
}
/// <summary>
/// Returns the index of the first occurrence of the specified page
/// in this tree, or 0 if this tree does not contain the page.
/// </summary>
public virtual int GetPageNumber(PdfPage page)
{
return(pages.IndexOf(page) + 1);
}
